Retail analyst Peter Keith of Piper Jaffray says Best Buy is a good investment, given its early advantages in smart home. The chain has embraced the comp-gaining category through a home security partnership with Vivint, and is remodeling the department to expand its assortment.

"Best Buy ( BBY) has gained more than 30% this year, with a big chunk of that gain coming in one day. But can Best Buy keep it up? Piper Jaffray's Peter Keith thinks it can."